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Heritage Sash Window - The Winston - Wooden Heritage Windows

Verified by manufacturer 4 months ago

Gowercroft Joinery Limited Third party certifications:
  • Made in Britain

    Made in Britain

    Certificate type

  • British Woodworking Federation

    British Woodworking Federation

    Certificate type

  • UKAS

    UKAS

    Certificate type

  • BRE Certificate

    BRE Certificate

    Certificate type

Timber Heritage Sash Window with U-value of 1.12 W/m²K. Heritage Sliding Sash Windows for listed properties or those in conservation areas.

Jump to:
BOS
+44 (0)1773 300510 Website

Application

Suitable for listed properties or those in conservation areas, due to their thin sections, traditional ironmongery and ultra-slim vacuum glazing.

Description

A range of timber heritage sash windows designed to incorporate a number of traditional features but utilizing modern design and materials, and also able to deliver a high performance.


A modern, efficient heritage sliding sash window which is an alternative to slim double glazing.


Features and benefits:

  • U-Value: 1.12 W/m²K.
  • Class 4 air permeability.
  • Class 4 weatherproofing.
  • Toughened vacuum glazing.
  • Manufactured from Accoya® timber.
  • Building Regulations Approved Document L Compliant.
  • 60+ year expected service life.
  • Manufactured from Accoya® with high energy efficiency.
  • Vacuum cavity glazing, delivering U-values comparable with modern double glazing, but with a total thickness of only 8.3 mm. No double reflection makes it suitable for use in conservation areas. LandVac glazing is also toughened as standard for safety and security.
  • Patented SashSealer technology delivering the only class 4 air permeability, traditional sliding sash window on the market. Weights and pulley window has a proprietary pocket seal to reduce draughts through the sash pulleys.
  • Traditional fitch fasteners, pulleys and sash limiters in a range of styles and finishes. Hung on traditional lead weights as standard, but also available with concealed spiral balances.
  • Slender 22 mm glazing bars and thin profile of the windows reduce the perceived width of the sections. External bar designed to replicate the traditional appearance of putty pointing.
  • Supplied with a full 10-year guarantee and are eligible for TimbaCare. 
  • Extended comprehensive guarantees - Energy efficiency that meets modern regulations - Traditional appearance for conservation projects - More cost-effective initially and in ongoing maintenance.

General information

Color

Beige

Black

Blue

Bronze

Brown

Show more

Finish

Painted

Stained

Material

Wood

Shape

Rectangle

Square

Other

Length

Bespoke

Width

Bespoke

Height

Bespoke

Warranty description

Eight year

Guidance for specification option:

5–8 year no maintenance stain warranty.

Ten year

Guidance for specification option:

  • 10 year no maintenance paint warranty.
  • 10 Year warranty on workmanship and materials.

Uniclass

Pr_30_59_98_96 Wood window unitsPrimary

CAWS

L10/10 Wood windows

L10/210 Wood windows

Product range

Heritage

Specification data - Wood window units

Standard

To EN 14351.

Product performance

-

Fire performance

-

Fire egress

Yes.

Weather performance

-

UK exposure category

To BS 6375-1, 1600 Pa.

Air permeability

To BS 6375-1, Class 4.

Watertightness

To BS 6375-1, Class A5.

Resistance to wind load

To BS 6375-1, Class C3.

Durability

-

Operation and strength characteristics

To BS 6375-2.

Environmental

-

Background ventilation

Yes.

Acoustic performance rating

39 dB.

Guidance for specification option:

Vacuum insulating glass unit, 4 mm/0.3 mm/4 mm. 

Manufacturer guidance

A range of acoustic, obscure, and solar control insulating glass units are also available; consult manufacturer.

Thermal

-

Whole window U-value

1.12 W/m²K, vacuum double glazed.

Frame

-

Standard

To BS EN 942.

Profile

Lambs Tongue beading and bar profiles. Bead mould to internal and external outer linings.

Wood species

Accoya.

Chain of custody

FSC.

Appearance class

For opaque finishing: to BS EN 942, J10 for glazing beads, drip mouldings and the like. J40 or better for all other members.

Finish as delivered

Factory applied Sirca paint, submerged prime coat, sprayed top coat.

Guidance for specification option:

Three coats of factory applied Sirca paint, one coat submerged prime coat, two coats sprayed top coats. Any colour available, finish to 30% sheen.

Ventilator

Yale SlotVent 2500EA.

Yale SlotVent 4000EA.

Yale SlotVent 5000EA.

Frame horns

Bottom sash: 75 mm Victorian horn.

Bottom sash: No horn.

Top sash: 75 mm Victorian horn.

Top sash: No horn.

Glazing or infill

-

Standard

Relevant parts of BS EN 1279.

Requirements

4 mm Low E internal glass, 0.3 mm vacuum cavity, 4 mm clear external glass.

Guidance for specification option:

Toughened as standard. Applied glazing bars as necessary, no bonded bars due to thin cavity.

Hardware

Spiral Balanced: Aged Brass - two Globe fitch catch; two sash lifts; two angel locks with stops.

Spiral Balanced: Black - two Globe fitch catch; two sash lifts; two angel locks with stops.

Spiral Balanced: Brushed chrome - two Globe fitch catch; two sash lifts; two angel locks with stops.

Spiral Balanced: Polished Brass - two Globe fitch catch; two sash lifts; two angel locks with stops.

Spiral Balanced: Satin chrome - two Globe fitch catch; two sash lifts; two angel locks with stops.

Weights and Pulleys: Aged Brass - four pulley wheels; two Globe fitch catch; two sash lifts; two angel locks with stops.

Weights and Pulleys: Black - four pulley wheels; two Globe fitch catch; two sash lifts; two angel locks with stops.

Weights and Pulleys: Brushed chrome - four pulley wheels; two Globe fitch catch; two sash lifts; two angel locks with stops.

Weights and Pulleys: Polished Brass - four pulley wheels; two Globe fitch catch; two sash lifts; two angel locks with stops.

Weights and Pulleys: Satin chrome - four pulley wheels; two Globe fitch catch; two sash lifts; two angel locks with stops.

Operation

-

Type

Spiral balanced with concealed balances.

Weights and pulleys.

Colour:

Beige.

Black.

Blue.

Bronze.

Brown.

Show more

Weather seal (factory applied)

Double gasketing system included as standard.

Glazing bars

18 mm Heritage extended in grid, mechanically fixed to sash prior to spray.

Guidance for specification option:

 Arched, gothic, marginal, and bespoke patterns available. Consult manufacturer and insert requirements.

Sustainability data

Contains Red List materials

No

Country of material origin

New Zealand

Manufacturer guidance

Timber - New Zealand

Glazing - China

Country of product manufacture

United Kingdom

Material

Wood

Embodied carbon

A1-A3 (production stage) as defined in BS EN 15804

107.80 kg CO₂ eq/kg

Self declared

Manufacturer guidance

Embodied carbon A1-A3 (cradle to gate) as defined in BS EN 15804:

92.70 kg CO₂ eq/kg for Hardwood window industry standard window size


Embodied carbon A1-A5 (cradle to install) as defined in BS EN 15804:

107.80 kg CO₂ eq/kg for Hardwood window industry standard window size


Embodied carbon A1-D (cradle to grave) as defined in BS EN 15804:

Negative 10,019.29 kg CO₂ eq/kg for Hardwood window industry standard window size

Recyclability

100%

Recycled content

As defined in clause 7.8 of BS EN ISO 14021

5 %

BIM objects

BOS

NBS BIM Object Standard

This BIM object has been authored to meet the requirements of the NBS BIM Object Standard.

Find out more about the NBS BIM Object Standard.

Platform Compatible Version
Revit
-

1

IFC
-

1

Third party certifications

Made in Britain

Made in Britain

Made In Britain

British Woodworking Federation

British Woodworking Federation

British Woodworking Federation

UKAS

UKAS

Enhanced Security Performance Certificate

BRE Certificate

BRE Certificate

EPD HOO3.1 Winston

Literature

Window Life Cycle Assessment

Window Life Cycle Assessment

Accoya® Brochure

Accoya® Brochure

Winston Heritage Sliding Sash U-Value Simulation Report

Winston Heritage Sliding Sash U-Value Simulation Report

Gowercroft Domestic Guarantee

Gowercroft Domestic Guarantee

Gowercroft Installation Manual

Gowercroft Installation Manual

Maintenance Manual

Maintenance Manual

Yale SlotVent Tricke Vent Brochure

Yale SlotVent Tricke Vent Brochure

Case studies

Templeton House: Award Winning Heritage Windows

Templeton House: Award Winning Heritage Windows

Mews House: Heritage Sash Windows

Mews House: Heritage Sash Windows

Repton School, Derby - Heritage Sash Windows

Repton School, Derby - Heritage Sash Windows

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